C# - Using nullable values, can a property's backing field initialize only when needed?

C# - Lazy initialization of properties' fields.dib

#!meta

{"kernelInfo":{"defaultKernelName":"csharp","items":[{"aliases":[],"name":"csharp"}]}}

#!csharp

/** Q: C# - Using nullable values, can a property's backing field initialize only when needed?
    A: If null or default initialization is acceptable, yes. Until get_Property is called, the field's value will remain default. (null, null) in this example.
 */
using System.ComponentModel;

#nullable enable
//default((bool?, Exception?)).Display(); // (null, null)
//((bool?)true, (Exception?)null).Display(); // (true, null)
public class TestClass
{
    private (bool? v, Exception? ex) testProperty;
    public (bool? v, Exception? ex) TestProperty{
        get{
            if (testProperty is (null, null)) // constant instead of default to use 'is'
            {
                testProperty.Display();
                /** (, )
                    Item1	<null>
                    Item2	<null>
                */

                return testProperty = (true, null);
            }
            else 
            {
                return testProperty;
            }
        }
    }
}

var t = new TestClass();
t.TestProperty.v.Display(); // True